What Causes Lower Back Pain, Breathlessness, Dizziness, Anxiety And Weakness In The Chest?

Question: For last 3 years I have had numerous symptoms that no one can explain, but all tests has come back normal. It all started in march 2014, I use to had urine starting trouble (urine hesitency), it use to take very long time to start urine, this problem use to come only when i sit longer during office. So during that time i had consulted a urologist who did urine analysis, culture and ultrasound for kub region and testicles. Everything came normal. Doc prescribed some antibiotics and that didn't work either. So i stopped eating them after a month. After couple of months the problem gone on its own.
Then from mid july 2014 i started having weakness in my chest and also having breathlessness(not able to breath deep and easily). So i had consulted a pulmonologist who did pulmonary function test and said it is normal. But breathlessness and weakness in chest continued. I also use to had muscle twiching inside my chest. One day my breathing difficulty worsened and i got a panick attack soon after that. I was joined in a hospital and doctors did all the tests that they know (CBC, Thyroid, HbA1c, Lipid, Liver profiles, X-rays, ultra sound for abdomen and pelvic etc). But all these tests come back normal. I was discharged from hospital after 24 hours.
But i was still having breathing problem and weakness in chest, so i went to see another doctor who asked me to have echocardiography test and even that came back normal. Every time when i get breathing problem i use to get very anxieted thinking that my breathing would stop. The problem continued for many months and i've lost all my confidence.
In aug 2015 i quit my job and decided to take rest, thinking that i might get healthy again. But i couldn't and my health problems continued. During my stay in home i also had some sleeping issues(may be i was thinking too much about my health). I have visited a psychiatrist thinking that it could some chemical imbalance in the brain that is causing breathing difficulty and weakness inside chest. The psychiatrist told me that checmical imbalance causes similar kind of symptoms and he prescribed me Paroxetine 12.5 mg and Clonazepam 0.5 mg. My sleeping issues gone, but breathing issues continued though. After few months my Psychiatrist stopped prescribing clonazepam as i was not having any sleeping issues, but he continued prescribing Paroxetine 12.5, though there was no improvement with my breathing problem, i kept taking it.
Then from April 2016 i started having pain in my lower back that radiates to both my legs, but mostly on right leg. I have visited a orthopedic doctor who prescribed me some pain killers and taught me some exercises. But i kept doing exercises but no use. Also pain moves from place to place. for example some times its in the lower back, and sometimes its in the sides of my buttocks or middle of the buttocks.
My current situation :
==>Breathlessness and weakness in chest.
==>Pain in my buttocks and in legs(sometimes it gets worst when i walk or sit longer)
==>dizziness and faiting once in a while despite having good diet
==>I also feel weekness in my both hands.
==>Anxiety and depression.
So now my question is, can I have any hormone imbalance that would cause above symptom?
Every time i visit a doctor they just do CBC blood test and say there is no problem and they don't want to do any further investigation. This makes me hopeless and i have lost all my confidence. :(

Hello Doctor,
Thank you for the reply, is it really necessary to do Cortisol level test at 8:00 am ?
I woke up today at 10 am and i have been to lab at 11 am and blood sample was taken around 11:30am. I haven't got the reports yet, once i get it i will post it here.

Thank you

Hello Doctor,
I've got the reports today, I'm attaching here. Please let me know if i need to do Cortisol level test at 8:00 am. The attached report was done at 11:30am.

Thank you

Thank you doctor for the reply, is there any other hormonal imbalances that would causes similar symptoms? By the way i had visited neurologist long ago and had ENMG which came back normal.